4=0.9k=4

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Solution for 4=0.9k=4 equation: 



4=0.9k=4

We move all terms to the left:

4-(0.9k)=0

We add all the numbers together, and all the variables

-(+0.9k)+4=0

We get rid of parentheses

-0.9k+4=0

We move all terms containing k to the left, all other terms to the right

-0.9k=-4

k=-4/-0.9

k=4+0.4/0.9

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